3V . This ensures uniform firing behavior on both the positive and negative sides of an alternating current cycle. Repetitive Peak On-State Current ( ITRMcap I sub cap T cap R cap M end-sub
The primary function of a DB2 DIAC is to serve as a high-speed trigger device. It remains in a highly resistive, non-conducting "off" state until the voltage across its two terminals reaches a critical threshold known as the Breakover Voltage ( VBOcap V sub cap B cap O end-sub
While searching for "14" in relation to this datasheet, many engineers often cross-reference the pinout. If you are laying out a PCB, ensure you are referencing the DB2 pinout (usually a DO-35 or DO-41 glass package depending on the specific variant) and not confusing it with the DB3 (which has different breakover voltage specs). diac db2 datasheet pdf 14 top
variants are more common in modern electronics, the DB2 remains a key component in legacy and specific phase-control circuits. Core Functionality and Structure
A DIAC (Diode for Alternating Current) is a solid-state semiconductor switch that conducts current only after its rated breakover voltage ( VBOcap V sub cap B cap O end-sub It remains in a highly resistive, non-conducting "off"
This is the voltage across the DIAC when it is conducting. For DB3 devices, the typical VO is often , but datasheets for DC34/DB4/etc. show values around 5V as well. This low on-state voltage drop is why the DIAC is an efficient trigger.
The "DB2" is often ranked as a top component for through-hole designs because: Core Functionality and Structure A DIAC (Diode for
The DB2 DIAC is an essential, robust component for phase-control circuits. Its predictable breakover voltage, specifically the symmetry within ±3V, ensures that TRIACs fire efficiently in both AC directions, minimizing harmonic distortion in power control applications.
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The voltage across the DIAC decreases as current increases, providing the sharp pulse needed for a TRIAC gate. 4. Typical Applications of the DB2 DIAC
Because the DB2 is less common than the DB3, a dedicated manufacturer’s PDF is not widely indexed. However, you can obtain equivalent datasheets by: